There is an important part of the brain rim called the amygdala, whose main function is to produce emotions, recognize emotions, and regulate emotions, while also being responsible for learning and memory functions. When the human body is subjected to external stimuli, the amygdala will prompt a strong orientation response. For example, when a dog suddenly pounces on you, your brain immediately reacts in two ways: either make you rush up and fight, or make you run. Of course, people often reflect the third reaction at the most critical moment - standing still, not knowing what to do, as the saying goes, "scared silly".